@robimarko if I do some iperf3 tests either with the BDF in the repo or with the one from stock firmware (with 108 bytes header, otherwise it won't work) I get crashes:
dmesg crash log
[ 1063.615003] qcom-q6v5-wcss-pil cd00000.q6v5_wcss: fatal error received:
[ 1063.615003] QC Image Version: QC_IMAGE_VERSION_STRING=WLAN.HK.2.9.0.1-01385-QCAHKSWPL_SILICONZ-1
[ 1063.615003] Image Variant : IMAGE_VARIANT_STRING=8074.wlanfw.eval_v2Q
[ 1063.615003]
[ 1063.615003] NOC_error.c:474 NOCError: FATAL ERRORparam0 :zero, param1 :zero, param2 :zero.
[ 1063.615003] Thread ID : 0x00000070 Thread name : ABTIST182 Process ID : 0
[ 1063.615003] Register:
[ 1063.615003] SP : 0x4b5cf438
[ 1063.615003] FP : 0x4b5cf440
[ 1063.615003] PC : 0x4b1080c4
[ 1063.615003] SSR : 0x00000008
[ 1063.615003] BADVA : 0x00020000
[ 1063.615003] LR : 0x4b107860
[ 1063.615003]
[ 1063.615003] Stack Dump
[ 1063.615003] from : 0x4b5cf438
[ 1063.615003] to : 0x4b5cf510
[ 1063.615003]
[ 1063.661896] remoteproc remoteproc0: crash detected in cd00000.q6v5_wcss: type fatal error
[ 1063.684141] remoteproc remoteproc0: handling crash #1 in cd00000.q6v5_wcss
[ 1063.692371] remoteproc remoteproc0: recovering cd00000.q6v5_wcss
[ 1063.724963] remoteproc remoteproc0: stopped remote processor cd00000.q6v5_wcss
[ 1069.016007] ath11k c000000.wifi: failed to send WMI_PDEV_BSS_CHAN_INFO_REQUEST cmd
[ 1069.016058] ath11k c000000.wifi: failed to send pdev bss chan info request
[ 1069.022773] ath11k c000000.wifi: failed to send WMI_PDEV_SET_PARAM cmd
[ 1069.029357] ath11k c000000.wifi: Failed to set beacon mode for VDEV: 0
[ 1069.035865] ath11k c000000.wifi: failed to send WMI_BCN_TMPL_CMDID
[ 1069.042372] ath11k c000000.wifi: failed to submit beacon template command: -108
[ 1069.047968] qcom-q6v5-wcss-pil cd00000.q6v5_wcss: start timed out
[ 1069.048540] ath11k c000000.wifi: failed to update bcn template: -108
[ 1069.055726] remoteproc remoteproc0: can't start rproc cd00000.q6v5_wcss: -110
[ 1069.061993] ath11k c000000.wifi: failed to send WMI_VDEV_SET_PARAM_CMDID
[ 1069.075433] ath11k c000000.wifi: failed to set BA BUFFER SIZE 256 for vdev: 0
[ 1069.082218] ath11k c000000.wifi: failed to send WMI_VDEV_SET_PARAM_CMDID
[ 1075.091919] ath11k_warn: 9 callbacks suppressed
[ 1075.091936] ath11k c000000.wifi: failed to send WMI_PDEV_BSS_CHAN_INFO_REQUEST cmd
[ 1075.095276] ath11k c000000.wifi: failed to send pdev bss chan info request
[ 1075.103212] ath11k c000000.wifi: failed to send WMI_PDEV_SET_PARAM cmd
[ 1075.109788] ath11k c000000.wifi: Failed to set beacon mode for VDEV: 0
[ 1075.116292] ath11k c000000.wifi: failed to send WMI_BCN_TMPL_CMDID
As you mentioned in the Xiaomi AX9000 thread I tried adding the ath11k-pci module and with that no more crashes. Does that make sense to you?